/* ======================================
   VARIABLES ET RESET
   ====================================== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --spacing: 1rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ======================================
   PAGE DE CONNEXION
   ====================================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-container {
  width: 100%;
  max-width: 400px;
}

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.login-header h1 {
  font-size: 1.75rem;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.login-header p {
  color: var(--text-light);
  font-size: 1rem;
}

.login-footer {
  margin-top: 1.5rem;
  text-align: center;
  color: var(--text-light);
}

/* ======================================
   HEADER
   ====================================== */
.app-header {
  background: var(--card-bg);
  box-shadow: var(--shadow);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.app-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

/* ======================================
   NAVIGATION
   ====================================== */
.app-nav {
  display: flex;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  position: sticky;
  top: 60px;
  z-index: 99;
}

.nav-btn {
  flex: 1;
  padding: 1rem;
  background: none;
  border: none;
  font-size: 0.875rem;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-btn:hover {
  background: var(--bg);
}

.nav-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* ======================================
   CONTENU PRINCIPAL
   ====================================== */
.app-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.view-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.period-selector {
  display: flex;
  gap: 0.5rem;
}

/* ======================================
   CARTES
   ====================================== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.card h3 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.charts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ======================================
   FORMULAIRES
   ====================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Toggle Buttons */
.toggle-buttons {
  display: flex;
  gap: 0.5rem;
}

.toggle-btn {
  flex: 1;
  padding: 0.75rem;
  border: 2px solid var(--border);
  background: var(--card-bg);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1rem;
  font-weight: 500;
}

.toggle-btn:hover {
  border-color: var(--primary);
}

.toggle-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ======================================
   BOUTONS
   ====================================== */
.btn {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-size: 0.938rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-sm {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
}

.btn-block {
  width: 100%;
  display: block;
}

/* ======================================
   JAUGE D'ÉQUILIBRE
   ====================================== */
.balance-container {
  margin-top: 1rem;
}

.balance-gauge {
  height: 40px;
  background: linear-gradient(90deg, #dc2626 0%, #f59e0b 18%, #10b981 50%, #f59e0b 82%, #dc2626 100%);
  border-radius: 20px;
  overflow: visible;
  margin-bottom: 1rem;
  position: relative;
}

.balance-gauge::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: rgba(15, 23, 42, 0.25);
  transform: translateX(-1px);
  z-index: 2;
}

.gauge-bar {
  position: absolute;
  top: 50%;
  left: 50%;
  width: clamp(1.8rem, 7vw, 2.4rem);
  height: clamp(1.8rem, 7vw, 2.4rem);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: left 0.45s ease, background 0.25s ease, box-shadow 0.25s ease;
  z-index: 3;
  pointer-events: none;
  border: 3px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.14), 0 8px 18px rgba(15, 23, 42, 0.18);
}

@media (max-width: 640px) {
  .balance-gauge {
    height: 46px;
  }

  .gauge-bar {
    width: 2rem;
    height: 2rem;
  }
}

.balance-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.balance-user {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.user-label {
  font-size: 0.875rem;
  color: var(--text-light);
}

.user-amount {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
}

.balance-status {
  padding: 0.75rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
  margin-top: 1rem;
}

.balance-status.equilibrium {
  background: #d1fae5;
  color: #065f46;
}

.balance-status.david-ahead {
  background: #dbeafe;
  color: #1e40af;
}

.balance-status.leo-ahead {
  background: #fef3c7;
  color: #92400e;
}

.balance-mode {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* ======================================
   RATIO SALAIRE vs DEPENSE
   ====================================== */
.salary-ratio-container {
  margin-top: 1rem;
}

.ratio-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.ratio-label {
  width: 80px;
  font-size: 0.9rem;
  color: var(--text-light);
}

.ratio-bar-wrap {
  flex: 1;
  background: #f1f5f9;
  border-radius: 8px;
  height: 18px;
  overflow: hidden;
}

.ratio-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6366f1 0%, #8b5cf6 100%);
  transition: width 0.5s ease;
}

.ratio-value {
  width: 80px;
  text-align: right;
  font-weight: 600;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 500;
}

.toggle-label input[type="checkbox"] {
  width: 50px;
  height: 26px;
  appearance: none;
  background: var(--border);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: all 0.3s;
}

.toggle-label input[type="checkbox"]::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  background: white;
  transition: all 0.3s;
}

.toggle-label input[type="checkbox"]:checked {
  background: var(--secondary);
}

.toggle-label input[type="checkbox"]:checked::before {
  left: 26px;
}

.mode-description {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-light);
}

/* ======================================
   INFO SALAIRES
   ====================================== */
.salaries-info {
  background: #fef3c7;
  border: 1px solid #fbbf24;
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.salaries-info.has-salaries {
  background: #d1fae5;
  border-color: #10b981;
}

.info-text {
  margin: 0;
  font-size: 0.938rem;
  color: var(--text);
}

/* ======================================
   LISTE DES DÉPENSES
   ====================================== */
.expenses-list {
  max-height: 500px;
  overflow-y: auto;
}

.expense-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.expense-item:hover {
  background: var(--bg);
}

.expense-item:last-child {
  border-bottom: none;
}

.expense-info {
  flex: 1;
}

.expense-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.expense-store {
  font-weight: 600;
  color: var(--text);
}

.expense-type {
  font-size: 0.813rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: var(--bg);
  color: var(--text-light);
}

.expense-details {
  font-size: 0.875rem;
  color: var(--text-light);
}

.expense-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.expense-amount {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.expense-buttons {
  display: flex;
  gap: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s;
}

.expense-item:hover .expense-buttons {
  opacity: 1;
}

.expense-edit,
.expense-delete {
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.125rem;
  transition: transform 0.2s;
}

.expense-edit {
  color: var(--primary);
}

.expense-delete {
  color: var(--danger);
}

.expense-edit:hover,
.expense-delete:hover {
  transform: scale(1.2);
}

@media (max-width: 640px) {
  .expense-buttons {
    opacity: 1;
  }
}

.expenses-empty {
  text-align: center;
  padding: 2rem;
  color: var(--text-light);
}

/* ======================================
   HISTORIQUE SALAIRES
   ====================================== */
.salaries-history {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.salary-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 8px;
}

.salary-month {
  font-weight: 500;
}

.salary-amount {
  font-weight: 600;
  color: var(--primary);
}

/* ======================================
   MESSAGES
   ====================================== */
.error-message {
  background: #fee2e2;
  color: #991b1b;
  padding: 0.75rem;
  border-radius: 8px;
  margin-top: 1rem;
  font-size: 0.875rem;
}

.success-message {
  background: #d1fae5;
  color: #065f46;
  padding: 0.75rem;
  border-radius: 8px;
  margin-top: 1rem;
  font-size: 0.875rem;
}

/* ======================================
   RESPONSIVE
   ====================================== */
@media (max-width: 640px) {
  .app-header h1 {
    font-size: 1rem;
  }
  
  .header-user span {
    display: none;
  }

  .nav-btn {
    font-size: 0.75rem;
    padding: 0.75rem 0.5rem;
  }

  .app-content {
    padding: 0.75rem;
  }

  .card {
    padding: 1rem;
  }

  .charts-grid {
    grid-template-columns: 1fr;
  }
}

/* ======================================
   GRAPHIQUES
   ====================================== */
canvas {
  max-height: none;
  min-height: 0;
  height: auto !important;
  width: 100% !important;
}

.chart-container {
  position: relative;
  width: 100%;
  height: 300px;
  margin: 1rem 0;
}

@media (max-width: 768px) {
  .chart-container {
    height: 250px;
  }
  
  canvas {
    max-width: 100% !important;
  }
}

/* ======================================
   PARAMÈTRES
   ====================================== */
.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.setting-item:last-child {
  border-bottom: none;
}

.setting-info {
  flex: 1;
}

.setting-info strong {
  display: block;
  margin-bottom: 0.25rem;
}

.setting-info p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-light);
}

.toggle-switch {
  display: block;
  width: 50px;
  height: 26px;
  background: var(--border);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: all 0.3s;
}

.toggle-switch::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  background: white;
  transition: all 0.3s;
}

.toggle-label input[type="checkbox"]:checked ~ .toggle-switch {
  background: var(--primary);
}

.toggle-label input[type="checkbox"]:checked ~ .toggle-switch::before {
  left: 26px;
}

.about-info p {
  margin: 0.5rem 0;
  font-size: 0.938rem;
}

.password-form {
  margin-top: 1rem;
}

/* ======================================
   DARK THEME
   ====================================== */
body.dark-theme {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --text: #f1f5f9;
  --text-light: #94a3b8;
  --border: #334155;
}

body.dark-theme .login-page {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

body.dark-theme .balance-gauge {
  background: #334155;
}

body.dark-theme .expense-item:hover {
  background: #334155;
}

body.dark-theme .salary-item {
  background: #334155;
}

body.dark-theme .balance-status.equilibrium {
  background: #064e3b;
  color: #d1fae5;
}

body.dark-theme .balance-status.david-ahead {
  background: #1e3a8a;
  color: #dbeafe;
}

body.dark-theme .balance-status.leo-ahead {
  background: #78350f;
  color: #fef3c7;
}

body.dark-theme .salaries-info {
  background: #78350f;
  border-color: #f59e0b;
}

body.dark-theme .salaries-info.has-salaries {
  background: #064e3b;
  border-color: #10b981;
}

body.dark-theme .expense-type {
  background: #334155;
}

/* ======================================
   ANIMATIONS
   ====================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view.active {
  animation: fadeIn 0.3s ease;
}

/* ======================================
   MODAL DÉTAIL DÉPENSES PAR UTILISATEUR
   ====================================== */
.expense-details-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: var(--spacing);
  animation: fadeIn 0.2s ease;
}

.expense-details-modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.expense-details-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.expense-details-header h3 {
  font-size: 1.25rem;
  color: var(--text);
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-light);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  transition: all 0.2s;
}

.close-btn:hover {
  background: var(--bg);
  color: var(--text);
}

.expense-details-content {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.expense-summary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 2rem;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.summary-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

.summary-value {
  font-size: 1.5rem;
  font-weight: 600;
}

.expense-breakdown {
  background: var(--bg);
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.expense-breakdown h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-light);
  margin: 0 0 0.75rem 0;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.breakdown-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.breakdown-item:last-child {
  border-bottom: none;
}

.breakdown-label {
  color: var(--text);
  font-weight: 500;
}

.breakdown-value {
  color: var(--text-light);
  font-weight: 600;
}

.expense-list-section {
  margin-top: 1.5rem;
}

.expense-list-section h4 {
  font-size: 1rem;
  color: var(--text);
  margin: 0 0 1rem 0;
  font-weight: 600;
}

.expense-details-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.expense-detail-item {
  background: var(--bg);
  padding: 1rem;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.expense-detail-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.expense-detail-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.expense-detail-store {
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

.expense-detail-date {
  font-size: 0.875rem;
  color: var(--text-light);
}

.expense-detail-meta {
  display: flex;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.expense-detail-type {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
}

.expense-detail-beneficiary {
  background: var(--secondary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
}

.expense-detail-amount {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .expense-details-modal {
    max-height: 95vh;
  }
  
  .expense-summary {
    flex-direction: column;
    gap: 1rem;
  }
  
  .expense-detail-item {
    grid-template-columns: 1fr;
  }
  
  .expense-detail-amount {
    justify-content: flex-start;
    margin-top: 0.5rem;
  }
}

/* ======================================
   TABLEAU MENSUEL (ANALYTICS)
   ====================================== */
.monthly-data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.monthly-data-table thead {
  background: var(--primary);
  color: white;
}

.monthly-data-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.monthly-data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.monthly-data-table tbody tr:hover {
  background: var(--bg);
}

.monthly-data-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 768px) {
  .monthly-data-table {
    font-size: 0.875rem;
  }
  
  .monthly-data-table th,
  .monthly-data-table td {
    padding: 0.5rem;
  }
}